Interior Designer
Tax & MTD Guide
Allowable expenses, samples and mileage, client disbursements and markups, VAT and MTD explained for UK self-employed interior designers.
Estimate your tax as a self-employed interior designer
Adjust the figures to see your estimated Income Tax and Class 4 National Insurance for the year.
Total turnover before expenses
Under £1,000 we use the trading allowance automatically
Estimated tax bill
£5,052
12.6% effective rate for 2026/27
- Income tax
- £3,886
- Class 4 NI
- £1,166
Take-home pay
£26,948
after tax, NI and expenses
This is an estimate using HMRC-confirmed rates for 2026/27, not your official tax calculation. TapTax is MTD-compatible, so you can connect to HMRC and file the real figures in a couple of taps.
- Interior design mixes a clean design-fee trade with messy product purchasing, and the biggest decision is whether furniture and fittings you buy run through your books at a markup or pass through as client disbursements, because that choice drives both your turnover and your VAT.
- If your gross self-employed income tops £1,000 you must register for Self Assessment; below that the trading allowance covers you and can be deducted instead of expenses.
- Mileage to sites, showrooms and suppliers is a core deduction: 45p a mile for the first 10,000 business miles then 25p, with a simple log to back it up.
- VAT bites early if you resell goods, because the full resale value counts as turnover, not just your fee, so designers cross £90,000 long before a fees-only consultant would.
- MTD for Income Tax applies from April 2026 above £50,000, April 2027 above £30,000, and April 2028 above £20,000, tested on gross income not profit.
Interior design is two businesses wearing one invoice. There is the creative trade: concepts, mood boards, space planning, schedules and project oversight that you charge as a design fee. And there is the procurement side: sourcing furniture, fabric, lighting, paint, flooring and fittings, often through trade accounts that the client never sees. The tax difficulty is almost never the design fee. It is the thousands of pounds of product flowing through your bank account that may, or may not, belong in your turnover, and getting that wrong inflates your numbers and pushes you into VAT years too early.
This guide is built around how designers actually earn and spend: the markup-versus-disbursement decision on goods, the sample, mileage and home-studio costs that make up real expenses, when VAT becomes unavoidable, and how MTD changes your record-keeping. Settle the procurement model first and everything downstream falls into place.
How Tax Works for a Self-Employed Interior Designer
As a sole trader you pay Income Tax on profit, which is your total income minus allowable expenses. For 2026/27 the personal allowance covers the first £12,570, then you pay 20% to £50,270, 40% to £125,140 and 45% above, with the personal allowance tapering away between £100,000 and £125,140 to create an effective 60% band. Class 4 National Insurance is 6% on profit between £12,570 and £50,270 and 2% above, with Class 2 NIC settled through Self Assessment.
Scottish designers pay Scottish Income Tax on their profit through six bands (19%, 20%, 21%, 42%, 45% and a 48% top rate) and carry an S-prefixed tax code, while National Insurance stays UK-wide. Welsh designers have a C-coded tax code at rates currently matching the rest of the UK. If your code looks wrong, perhaps because an old salaried design-studio job or a part-time PAYE role is distorting it, run it through the tax code checker.
The Big Question: Markup or Disbursement on Goods
This single decision shapes your tax return more than any expense, so settle it deliberately. When you buy furniture, fabric or fittings for a project, the money runs through your account one of two ways.
- Markup vs disbursement
- Under a markup (or buy-and-resell) model you purchase goods on your own trade account, take ownership, then sell them to the client at a higher price. The full sale value is your income and the cost is your expense, so you are taxed on the margin and the whole resale value counts toward your VAT threshold. Under a disbursement model you buy as the client's agent and recharge the exact supplier cost with no markup; the money is a pass-through, neither income nor expense for you, and it stays out of your turnover. You usually charge a separate design or procurement fee instead.
The markup model is simple to run and lets you profit on sourcing, but it inflates your turnover fast and drags you toward VAT registration. The disbursement model keeps purchasing out of your turnover, which can keep a busy designer below £90,000 for longer, but the rules are strict: the cost must be recharged exactly, the client must really be the one buying, and you cannot dress up your own trade purchases as disbursements. Pick one approach per client, document it in your terms, and never mix them on the same project. When you do mark goods up, both the buy and the sell belong in your accounts, so use the multiple-income tax calculator if you also run separate fee and product streams.
The Trading Allowance and Starting Out
Many designers begin alongside a studio job or do a few rooms for friends before going solo. The £1,000 trading allowance is built for this. If your gross self-employed income from all design work is £1,000 or less in a tax year, it is tax-free and you do not need to register for Self Assessment for it. Cross £1,000 and you must register and report the full amount. If you are still treating this as a sideline, our guide to side hustle income explains how the threshold and reporting work alongside a main job.
Above the threshold you choose each year: deduct the flat £1,000 allowance instead of working out actual expenses, or deduct your real allowable costs if they come to more. A designer with a serious software, sample and mileage habit almost always does better claiming actuals, but the allowance is handy in a very quiet first year.
Allowable Expenses for Interior Designers
An expense is allowable when incurred wholly and exclusively for the business. A designer's list spans creative tools, samples, travel and studio costs.
| Expense | What qualifies | Notes |
|---|---|---|
| Design software | CAD, SketchUp, AutoCAD, Adobe Creative Cloud, rendering and project-management subscriptions | Subscriptions fully deductible |
| Computer and devices | Laptop, large monitor, tablet and stylus, colour-accurate display | Usually claimed in full via the Annual Investment Allowance |
| Samples and swatches | Fabric sample books, paint testers, flooring and tile samples, finish boards | Allowable where used to win or deliver projects |
| Home-studio costs | HMRC flat-rate working-from-home allowance, or a fair proportion of heat, light, broadband, rent or mortgage interest | Choose the larger fair deduction |
| Premises | Studio or showroom rent, business rates, utilities | Allowable if you have dedicated premises |
| Mileage and travel | Site visits, showrooms, trade fairs, supplier warehouses, client meetings | 45p per mile to 10,000 then 25p, or actual vehicle costs |
| Insurance | Professional indemnity and public liability cover | Fully deductible |
| Memberships | BIID, SBID, BIDA and similar professional bodies | Allowable where relevant to the trade |
| Marketing | Website, portfolio photography, social ads, printed lookbooks, trade-show stand | Fully deductible running costs |
| Accountancy and bank fees | Bookkeeping, Self Assessment, business banking | Fully deductible |
Samples, Mileage and Home-Studio in Detail
Three costs dominate a real designer's expenses. Samples are easy to lose track of because they trickle out in small amounts: keep every sample-book and paint-tester receipt, as they add up over a year and are unambiguously business costs. Mileage is usually large because the job is mobile. Use HMRC's flat rate of 45p a mile for the first 10,000 business miles and 25p after that, which covers fuel, insurance, servicing and depreciation, and keep a log of dates, destinations and miles. Alternatively claim actual running costs apportioned to business use, but you cannot switch methods on the same vehicle once chosen. Home-studio running costs matter for the many designers who work from a spare room: use HMRC's simplified flat rate based on hours worked at home, or claim a fair proportion of actual household costs based on rooms used, then pick the larger.
What You Cannot Claim
The private share of dual-use broadband, phone, vehicle and devices must be excluded. Everyday clothing is never allowable even if you dress smartly for client pitches. Client entertaining and most hospitality are disallowed. Ordinary commuting to a fixed base is not business travel. And goods you buy purely on a client disbursement basis are not your expense at all, because they never become your trade purchases.
Worked Example: A Designer on £46,000 of Fees
Take a designer who works on a fees-and-disbursement model, charging £46,000 in design and project-management fees and recharging product to clients at cost (so it stays out of turnover).
Income: £46,000 design and project fees
Allowable expenses:
- CAD, rendering and Adobe subscriptions: £1,400
- Laptop, colour-accurate monitor and tablet (AIA, in full): £2,200
- Sample books, swatches and paint testers: £900
- Mileage (8,200 business miles at 45p): £3,690
- Professional indemnity and public liability insurance: £650
- Home-studio actual-cost proportion: £1,500
- BIID membership, website and portfolio photography: £1,100
- Accountancy and bank fees: £600
- Total expenses: £12,040
Taxable profit: £46,000 minus £12,040 = £33,960
Income Tax: £33,960 minus £12,570 = £21,390 at 20% = £4,278
Class 4 NIC: £21,390 at 6% = £1,283
Total tax and NIC: £5,561 for the year. Because product is handled as disbursements, none of the resale value inflates turnover, which both lowers the headline figures and keeps this designer comfortably below VAT registration. Run your own numbers through the sole trader tax calculator to sanity-check.
For an interior designer, the costliest mistake is not a missed expense, it is running thousands of pounds of client furniture through your turnover when it should have been a disbursement. Decide the model before you buy, not at year end.
VAT for Interior Designers
You must register for VAT once taxable turnover exceeds £90,000 in any rolling 12-month period. The trap is that designers who buy and resell goods reach this far sooner than a fees-only consultant, because the full resale value counts as turnover, not just the design fee. A designer charging £60,000 in fees but turning over another £80,000 of marked-up furniture is well over the threshold even though the margin on the goods is thin.
Two levers help. First, the disbursement model keeps recharged supplier costs out of your turnover when you buy strictly as the client's agent and recharge at cost. Second, weigh who your clients are: if most are private homeowners who cannot reclaim VAT, registration adds 20% to their bill and may make you less competitive, whereas commercial clients reclaim it painlessly. If you do register, you reclaim VAT on your software, equipment, samples and overheads. Model the impact carefully before opting in voluntarily.
MTD for Income Tax: What Changes for Designers
Making Tax Digital for Income Tax Self Assessment replaces the annual return with quarterly digital submissions and a year-end finalisation. The thresholds are based on gross income, not profit:
- April 2026: Combined trading and property income over £50,000
- April 2027: Over £30,000
- April 2028: Over £20,000
For a designer the gross-income test is the catch. If you buy goods on for clients at a markup, the full resale value is turnover, so you can be over £50,000 of gross income even on modest fees, and that pulls you into MTD sooner than your profit alone would suggest. The disbursement model keeps pass-through purchasing out of the count. Practically, MTD means logging each fee, sample receipt and mileage trip digitally as it happens and sending HMRC a quarterly summary instead of one frantic January reconciliation. Our guide to MTD for sole traders walks through the quarterly rhythm in practice.
Common Mistakes Interior Designers Make
Mixing markup and disbursement on the same job. Decide per client whether goods run through your books or pass through as the client agent, and document it. Blurring the two distorts both turnover and VAT.
Running resold furniture through turnover without realising it triggers VAT. The full resale value counts, not just your margin, so designers cross £90,000 far sooner than they expect.
Not logging mileage. Site visits, showrooms and supplier runs add up to thousands of deductible miles a year, but only if you keep a contemporaneous log.
Losing sample and tester receipts. They are small and frequent, so they slip through, yet they are unambiguous business costs that add up.
Assuming a PAYE allowance covers design income too. If a part-time studio job already uses your personal allowance, every pound of design profit is taxed from the basic rate up, so set money aside accordingly.
People also ask
Quarterly expenses under MTD: the £90,000 rule
If your annual business turnover is £90,000 or less, HMRC lets you report a single consolidated expenses total in each Making Tax Digital quarterly update instead of breaking expenses down into itemised categories. Most self-employed interior designer businesses are under this threshold, so a quarterly update can be as simple as two figures: total income and total expenses. You still need to keep digital records of each individual expense - the relaxation only changes how much detail goes into the quarterly update itself.
Frequently asked questions
Calculators for interior designers
Helpful guides
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